Re: Applet Help

by Neil M. :: Rate this Message:

Thanks, I guess should explain some more. First, I'm using Jython 2.5 RC4
if that makes a difference. Also, the files do not exist on the webserver
nor do I want them to be there, the .class and .py files (along with all
of jython) are included in the .jar file and I expect it to just find and
load those. I don't want to see any HTTP requests like I'm seeing because
it is unbearably slow to load the applet that way.

I changed the way the factory gets called, for example I do this to get a
class:

JythonFactory jf = JythonFactory.getInstance();
Downloader eType = (Downloader) jf.getJythonObject(
"jyinterface.Downloader", "JDownloader");

There is a corresponding Downloader.class and JDownloader.py file included
in the .jar.

So it should just be looking in classpath and sys.path to import things?
I don't understand why it is hitting the webserver to do this. I figure
it must be a classpath or pythonpath issue?

Neil

> Neil-
>
> It seems from your example like you are passing a string representation of
> the path to the Python modules. That is one way of performing this task.
> Another way is to place the modules somewhere in your sys.path and pass
> just
> the name of the module instead of the complete path. You can take a look
> at
> an article submitted to Jython Monthly by Charlie Groves for more
> information:
> http://wiki.python.org/jython/JythonMonthly/Articles/October2006/3 on this
> technique. You'd have to modify your code a bit, but this may be one way
> to
> get around these errors.
>
> I am not exactly sure why you are receiving the errors unless the modules
> are not available to the web server in the designated path that you are
> sending to the factory.
>
> Hope this gets you headed in the right direction for resolving the errors.
>
> Josh Juneau
> juneau001@...
> http://jj-blogger.blogspot.com
> Twitter ID: javajuneau
>
>
> On Mon, Jun 15, 2009 at 12:16 PM, Neil M. <nabber00@...> wrote:
>
>> Hi, I'm trying to run a Java Applet with a Java Swing GUI but using a
>> python library as a backed. I've packed it all into a .jar that runs
>> fine as a standalone Java app. When I move it to the webserver it seems
>> to be issuing HTTP requests (see attached log) for various imports and I
>> have no idea why. Something with the classpath or pythonpath? Any
>> ideas?
>>
>> Neil
>>
>> --------------- modified jython factory ----------------------
>> public static Object getJythonObject(String interfaceName,
>> String pathToJythonModule){
>>
>> Object javaInt = null;
>> PythonInterpreter interpreter = new PythonInterpreter();
>> //interpreter.execfile(pathToJythonModule);
>> interpreter.exec("import " + pathToJythonModule);
>> //String tempName =
>> pathToJythonModule.substring(pathToJythonModule.lastIndexOf("/")+1);
>> String tempName =
>> pathToJythonModule.substring(pathToJythonModule.lastIndexOf(".")+1);
>> //tempName = tempName.substring(0, tempName.indexOf("."));
>> //System.out.println(tempName);
>> String instanceName = tempName.toLowerCase();
>> String javaClassName = tempName.substring(0,1).toUpperCase() +
>> tempName.substring(1);
>> //String objectDef = "=" + javaClassName + "()";
>> String objectDef = "=" + pathToJythonModule + "." + javaClassName
>> + "()";
>> interpreter.exec(instanceName + objectDef);
>> //System.out.println(instanceName + objectDef);
>> try {
>> Class JavaInterface = Class.forName(interfaceName);
>> javaInt =
>> interpreter.get(instanceName).__tojava__(JavaInterface);
>> } catch (ClassNotFoundException ex) {
>> ex.printStackTrace(); // Add logging here
>> }
>>
>> return javaInt;
>> }
>>
>>
>> -------------------- HTTP Log --------------------
>>
>> [Sun Jun 14 18:50:40 2009] [error] [client X] File does not exist:
>> /download_test/stat$py.class
>>
>> [Sun Jun 14 18:50:41 2009] [error] [client X] File does not exist:
>> /download_test/stat$py.class
>> [Sun Jun 14 18:50:42 2009] [error] [client X] File does not exist:
>> /download_test/java
>> [Sun Jun 14 18:50:45 2009] [error] [client X] File does not exist:
>> /download_test/java
>> [Sun Jun 14 18:50:46 2009] [error] [client X] File does not exist:
>> /download_test/java
>> [Sun Jun 14 18:50:46 2009] [error] [client X] File does not exist:
>> /download_test/java
>> [Sun Jun 14 18:50:47 2009] [error] [client X] File does not exist:
>> /download_test/org.class
>> [Sun Jun 14 18:50:47 2009] [error] [client X] File does not exist:
>> /download_test/org.class
>> [Sun Jun 14 18:50:48 2009] [error] [client X] File does not exist:
>> /download_test/org
>> [Sun Jun 14 18:50:48 2009] [error] [client X] File does not exist:
>> /download_test/org
>> [Sun Jun 14 18:50:49 2009] [error] [client X] File does not exist:
>> /download_test/org
>> [Sun Jun 14 18:50:50 2009] [error] [client X] File does not exist:
>> /download_test/org
>>
>>
>> ------------------------------------------------------------------------------
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>

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